显示用户上次访问的事件

package cn.itcast.cookie;


import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;


import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


 
public class CookieDemo1 extends HttpServlet {
 
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");

//记录上次访问的事件
response.getWriter().print("你上次访问的事件是：");

//获得用户名的事件cookie
Cookie[] cookies = request.getCookies();
for(int i=0;cookies!=null&&i<cookies.length;i++){
if(cookies[i].getName().equals("time")){
//得到用户的上次访问时间
long value = Long.parseLong(cookies[i].getValue());
DateFormat df = new SimpleDateFormat("yyyy年MM月dd日HH时mm分ss秒");
response.getWriter().print(df.format(value));
}
}
//给用户会送最新的访问事件，时间的毫秒值
Cookie cookie = new Cookie("time",System.currentTimeMillis()+"");
//设置有限期
cookie.setMaxAge(60*60);
cookie.setPath("/day05");
response.addCookie(cookie);
}


protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}

}

在web.xml输入

<servlet>
    <description></description>
    <display-name>CookieDemo1</display-name>
    <servlet-name>CookieDemo1</servlet-name>
    <servlet-class>cn.itcast.cookie.CookieDemo1</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>CookieDemo1</servlet-name>
    <url-pattern>/cook1</url-pattern>
  </servlet-mapping>